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From "Hive QA (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-8518) Compile time skew join optimization returns duplicated results
Date Mon, 20 Oct 2014 15:11:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-8518?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14176961#comment-14176961
] 

Hive QA commented on HIVE-8518:
-------------------------------



{color:green}Overall{color}: +1 all checks pass

Here are the results of testing the latest attachment:
https://issues.apache.org/jira/secure/attachment/12675794/HIVE-8518.1.patch

{color:green}SUCCESS:{color} +1 6565 tests passed

Test results: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/1352/testReport
Console output: http://ec2-174-129-184-35.compute-1.amazonaws.com/jenkins/job/PreCommit-HIVE-TRUNK-Build/1352/console
Test logs: http://ec2-174-129-184-35.compute-1.amazonaws.com/logs/PreCommit-HIVE-TRUNK-Build-1352/

Messages:
{noformat}
Executing org.apache.hive.ptest.execution.PrepPhase
Executing org.apache.hive.ptest.execution.ExecutionPhase
Executing org.apache.hive.ptest.execution.ReportingPhase
{noformat}

This message is automatically generated.

ATTACHMENT ID: 12675794
 - PreCommit-HIVE-TRUNK-Build

> Compile time skew join optimization returns duplicated results
> --------------------------------------------------------------
>
>                 Key: HIVE-8518
>                 URL: https://issues.apache.org/jira/browse/HIVE-8518
>             Project: Hive
>          Issue Type: Bug
>            Reporter: Rui Li
>            Assignee: Rui Li
>         Attachments: HIVE-8518.1.patch
>
>
> Compile time skew join optimization clones the join operator tree and unions the results.
> The problem here is that we don't properly insert the predicate for the cloned join (relying
on an assert statement).
> To reproduce the issue, run the simple query:
> {code}select * from tbl1 join tbl2 on tbl1.key=tbl2.key;{code}
> And suppose there's some skew in tbl1 (specify skew with CREATE or ALTER statement).
> Duplicated results will be returned if you set hive.optimize.skewjoin.compiletime=true.



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